ANCYLUS. 221 
Subfamily ANCYLINZ 
—_— 
Genus ANC YLUS, Geoffroy. 
The number of known species has been 
nearly doubled since the publication of Prof. 
Haldeman’s Monograph, the additions being 
principally from the States of Oregon and 
California. The shells are generally small, 
and not readily detected. 
A. SPECIES OCCURRING IN THE STATES EAST OF 
THE Rocky MountaIns. 
1. ANCYLUS OBSCURUS, Haldeman. 
Haldeman, Monog. p. 5, t. 1, fig. 5. 
I have heard of no other locality than the 
original one. That the species occurring in 
the West India islands is the same as this I 
think doubtful, although Adams and Shuttle- 
worth believe it to be the same. 
(15) 
